Make googletest not to include regex.h
Make googletest not to include regex.h

Add -DGTEST_HAS_POSIX_RE=0 cxxflag for testing
oniguruma matcher/filter.
googletest includes POSIX regex.h that conflicts
oniguruma definitions.

kumagi/jubatus_core,gintenlabo/jubatus_core,kmaehashi/jubatus,rimms/jubatus,gintenlabo/jubatus_core,Asuka52/jubatus,mathn/jubatus,elkingtonmcb/jubatus,Asuka52/jubatus,rimms/jubatus,roselleebarle04/jubatus,rimms/jubatus_core,kmaehashi/jubatus_core,kumagi/jubatus_core,gintenlabo/jubatus,gintenlabo/jubatus,gintenlabo/jubatus_core,jubatus/jubatus,roselleebarle04/jubatus,elkingtonmcb/jubatus,rimms/jubatus_core,kumagi/jubatus_core,kmaehashi/jubatus,gintenlabo/jubatus_core,jubatus/jubatus,mathn/jubatus,kmaehashi/jubatus_core,kmaehashi/jubatus_core,kumagi/jubatus_core,kmaehashi/jubatus_core,rimms/jubatus_core,rimms/jubatus_core,jubatus/jubatus